state_machine

https://github.com/pluginaweek/state_machine

Ruby

Adds support for creating state machines for attributes on any Ruby class

StateMachine::Transition#run_callbacks

Runs the before / after callbacks for this transition.  If a block is
provided, then it will be executed between the before and after callbacks.

Configuration options:
* +before+ - Whether to run before callbacks.
* +after+ - Whether to run after callbacks.  If false, then any around
  callbacks will be paused until called again with +after+ enabled.
  Default is true.

This will return true if all before callbacks gets executed.  After
callbacks will not have an effect on the result.

Source | Google | Stack overflow

Edit

git clone [email protected]:pluginaweek/state_machine.git

cd state_machine

open lib/state_machine/transition.rb

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-StateMachine--Transition-run_callbacks-for-pr

# Commit to git

git add lib/state_machine/transition.rbgit commit -m "better docs for StateMachine::Transition#run_callbacks"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-StateMachine--Transition-run_callbacks-for-pr

hub pull-request

# Celebrate!